in neet omr sheet if I put a dot in wrong option and then dark right circle..is there any negetive mark or not please reply??

Hi,
Here the result would depend on the size of dot on the wrong circle, whether it is detectable to the scanner or not.
If the size of your dot was negligible and the scanner couldn't detect it, then obviously the large circle would be considered.
But if the scanner detects that small dot, the both the circles will be detected. In this case, your response/answer is considered invalid. Hence that question will be rejected. No negative marking . That would be treated as an unattempted question.
Hope it help!